I copied over the mod to subcatagories.tpl and the layout works great except now I get a warning-

Warning: Unknown modifier '/' in /x-cart/Smarty-2.5.0/plugins/modifier.regex_replace.php on line 13

Any ideas on how to get rid of it? If I restore the file to default the message goes away. I tried to check the file but don't know enough about php to figure it out. I'm using x-cart 3.4.8, php 4.2.3.